From 52e817c85ebba7e39fb3a9f23b22dc26ed6b934a Mon Sep 17 00:00:00 2001
From: RD-AP-PPT <69512315+RD-AP-PPT@users.noreply.github.com>
Date: Thu, 6 May 2021 17:35:24 +0200
Subject: [PATCH] ignore Interrupted system call error and retry (#1499)

---
 .../System/Device/Gpio/LibgpiodDriverEventHandler.cs  | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/src/System.Device.Gpio/System/Device/Gpio/LibgpiodDriverEventHandler.cs b/src/System.Device.Gpio/System/Device/Gpio/LibgpiodDriverEventHandler.cs
index e9a4d42e..32d332e8 100644
--- a/src/System.Device.Gpio/System/Device/Gpio/LibgpiodDriverEventHandler.cs
+++ b/src/System.Device.Gpio/System/Device/Gpio/LibgpiodDriverEventHandler.cs
@@ -11,6 +11,8 @@ namespace System.Device.Gpio.Drivers
 {
     internal sealed class LibGpiodDriverEventHandler : IDisposable
     {
+        private const int ERROR_CODE_EINTR = 4; // Interrupted system call
+
         private static string s_consumerName = Process.GetCurrentProcess().ProcessName;
 
         public event PinChangeEventHandler? ValueRising;
@@ -55,7 +57,14 @@ namespace System.Device.Gpio.Drivers
                     WaitEventResult waitResult = Interop.libgpiod.gpiod_line_event_wait(pinHandle, ref timeout);
                     if (waitResult == WaitEventResult.Error)
                     {
-                        throw ExceptionHelper.GetIOException(ExceptionResource.EventWaitError, Marshal.GetLastWin32Error(), _pinNumber);
+                        var errorCode = Marshal.GetLastWin32Error();
+                        if (errorCode == ERROR_CODE_EINTR)
+                        {
+                            // ignore Interrupted system call error and retry
+                            continue;
+                        }
+
+                        throw ExceptionHelper.GetIOException(ExceptionResource.EventWaitError, errorCode, _pinNumber);
                     }
 
                     if (waitResult == WaitEventResult.EventOccured)
-- 
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